Finding the Fourth Proportional to 21,829.98, 30,112.25 and 13,328.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,829.98 : 30,112.25 = 13,328.22 : x
2. Step 2: Convert to fraction form
   21,829.98/30,112.25 = 13,328.22/x
3. Step 3: Cross multiply
   21,829.98x = 30,112.25 × 13,328.22
4. Step 4: Simplify right side
   21,829.98x = 401,342,626.05
5. Step 5: Solve for x
   x = 401,342,626.05/21,829.98
6. Step 6: Final answer
   x = 18,384.93